分解振动

SSS 2009-01-14

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. When we think about how to represent sound visually, most of us probably picture those volume-dependent sine waves. But thats not how John Stuart Reid

发表于:2019-01-08 / 阅读(57) / 评论(0)

Scientific American(一)月

技术带来的七大变化 Seven ways technology has changed us

It has become customary to talk of technology as if it were a special sector of the economy consisting of the manufacture of sophisticated electronic goods, the creation of software, and the provision of services reliant on information and communicat

发表于:2019-02-08 / 阅读(58) / 评论(0)

英语新闻

麦当劳放了6年未变质

An Icelandic man who purchased the last-ever McDonald's meal sold before the chain closed down in the country in 2009 was stunned when he found it did not go mouldy. 在2009年麦当劳连锁店在冰岛全部关闭之际，一个冰岛居民买了最后

发表于:2019-02-09 / 阅读(256) / 评论(0)

阅读空间

人死的时候身体会发生什么变化呢？

在我们的生活中，死亡是我们所有人必定会遇到的事情，无论是家庭成员还是宠物，甚至是你都将有终结之时。事实上，每分钟世界上大约就有100人死亡。但在人死之时到底会发生什么呢？

发表于:2019-02-17 / 阅读(83) / 评论(0)

阅读空间

你会用“逗号”吗？

1. 在并列连词(and, but, for, nor, or, yet )前使用，用来连接句中的各分句。 The principal reason for this is that none of them possesses chlorophyll, andsince they cannot synthesize their own carbohydrates, they obtain their supplie

发表于:2019-02-19 / 阅读(59) / 评论(0)

托福英语

雅思写作语料库：家庭关系不紧密

雅思写作语料库：家庭关系不紧密社会类： It is generally accepted that families are not as close as they used to be. Give some reasons why this change has happened and suggest how families could be brought closer together. Include a

发表于:2019-02-26 / 阅读(94) / 评论(0)

雅思英语

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学英语单词

a good sort of body

ability to borrow

acoustical strain gage

aguero

ammonium chrome alum

anterethic

APC (automatic pressure control)

automated instructional materials services

Balashikha

Bannberscheid

be on the mike